Lug strap and method of making



2, 1930 w. IJBULLARD 1,775, 7

' we STRAP up umhon OF mum Filed May 26, 192k sheotk'shut .1

l l I l I l l 1 l l W 2. igiviiifai' I S p 2, 1930. w. 1. BULLARD LUG STRAP AND METHOD QF' IAKING 2 Sheets-Shut 2 Filed May 26. 1928 irarenred se e. a rose VVASHINGTCN IRVING-.BULLAED, F BOSTON, MASSACHUSETTS, ASSIGNGR T0 E. E.

JACQIBS, MFG. 50., INCL, 0F DANIELSON, CONNECTICUT, A CORPORATION OF CON- n norrcur I Application filed. flay 26,

not only does the lug strapwear out at the bow but,'because of the blows imparted at' the picker stick, there is a tearing out of the 135i; material of the lug strap at the bolt slot and a large percentage of lug straps are destroyed for this reason long before they have been worn out at the bow. It has been proposed to reinforce the lug straps by placing within the fabric body. a core of fibrous material, such as vulcanized fibre, and in this case the vulcanilaed fibre extends throughout the entire length of the lug strap. Such construction, however, is not satisfactory as the vulcanized fibre tends to break down under repeated blows and also there is a marked tendency on the partof fabric to separate from the vulcanized fibre regardless of the character of the adhesive used during the propess of manufacturer A difficulty .a-t-tendant the manufacture. of lug straps is that while they must be strong and able to withstand repeat ed blows from the picker stick, yet they must be light and the various attempts, therefore that have been made to reinforce the lug straps, such the insertion of a vulcanized fibre core, has rendered the lug straps too heavy to be of service.

In my present invention, I have obviated the defects 'to'prior devices, and have produced an improved lug strap provided with reinforcements at thebow and at the bolt slots, which construction makes a lug strap that .is amply strong for any purpose'for which 7 be used and yet is light enough to meet all the requirements in the textile art.

With addition of the reinforcing member [113 how, I am enabled to not only make this ow section strong but the bow is larger 4. 1039 resilient, and further, with the rethat so soon destroys the useful- L'UG- srnar nnniun'rnonon Trauma 1928. Eeiial 3550. 280,806.

which gives it enormously additional strength without additional weight. In addition to my improved lug strapfor looms as an article of manufacture, I believe the method by which thesame'is manufactured to be distinctly new and l desire to claim the method of manufacture herein. Further, it is believed that the method of manufacture is so closely allied with the article manufactured thereby as to have these two items constitute a single unitary" invention, a therefore, claims for both the article a the method of manufacturing the same are incorporated herewith.

An object of my invention, th refore, is an improved lug strap for looms.

Another object is an improved methodof manufacturing lug straps for looms and the like. I

In the accompany" ililWl' illustrating preferred embodiments of vention,

Fig. 1 is a developed view of the elements comprising a lug strap manufactured according to my improved method;

- Fig. 2 is a view showing the developed form of lug strap illustrated in Fig. 1 rolled up and placed in position in a mold;

Fig. 3 is a sectional view on the line 83 ofFig. 2 showing the upper portion of the mold in position to form the inner surface of the lug strap;

Fig. i is a view similar to Fig. 1 and showing an improved form of reinforcing;

Fig. 5 is a plan view of a completed lug "strap made either from the elements shown in Fig. 1 or the elements shown in Fig. 4;;

Fig. 6 is a side elevation of 5;

Fig. 7 is a sectional view through a rolled up lug strap of the material shown in Figs. 1

and-4 and before being subjected to the molding action;

Fig. 8 is a sectional view on the line 8-8 of Fig. 5*, and

- 1 i 9 is a view similar to 8 but illus trati'ng in cross sectionwires orthreads indica'ted'in Fig. 4 andextending'longitudinally of the strap structure. i g Y Referring to the drawings, and particularly' Figs. 1, 2, and 3, 10 design and-in the relation shown, a layer of ticking dr' duck 11 and the layer 11 at each side there it of and arranged parallel thereto and in po-- sition .to occupy a space in the completedlug f strapoccupied by the bolt slot has parallell'y.

andresti ng on thelayer 11 are rectangular process or -method-ofinanufacturin a lug strap embodying my invention. 'I. e elements shown in Fig. 1 are now. rolled or fold-' ed upon each other so that a cross sectional View through the center thereof will be sim-. ilar to that shown in Fig; 7-. The entirerolled structure-is saturated. with an adhe :sive such as glue, or synthetic resin. A commercial form of synthetic resinis knownas to heat as well.

' textolite' and is'made. of laminated or macerated' material and an adhesive thermo-plastic binder which hardens, under heat. When the structure is in the rolled up position above.described, it is placed in a mold- 15 which has the shape in plan view as that il-- lustrated in Fig, 2. The structure is then subjected to heavy pressure and where bakelite or synthetic resin is used as the adhesive,

Referring to this figure, it will noticed that the central portion thereof occupies a v 'dangerof pulling out at the bolt slots 21 is space that is considerably wider than the remainder of the lug strap. due to the presence in the rolled up material of therein-- forcing layers 13 and 14'. After being placed infthe mold 15, a top plate 16 forming part of the mold structure is placed over the lug. strap structure as shown in Fig.3, there be-' ing, first placed and glued to the upper sur- H face of the lug strap structure a layer 17 of leather .or. similar material. Fig' 3, which shows a cross sectional view on the line 3-3 Kit) of Fig. 2 illustrates the reinforced portions as compared with the rest of'the structure' Referring to such Fig. 3, itwill be seen'that the central portion is raised up to an extent greaterthan any other part of the lug strap, While the end portions 18 are raised up but not to the extent of the central'portion. On the contrary, the portions 19 intermediate the end portions 18 and the central portion are and have practically the same cross sectional area as the older type of lug strap. Thisis so because such construction is sufficiently strong and yet not being subjected to blows or direct wear, reinforcing at these pomts is not necessary.

ates a layer of ticking or duck on which 18 superimposed,

gle point, regardless of the relative After the materials shown in, Fig. 1 have i been subjected to the formingv process as illustrated Figs. 2. and 3,:th e partly finished v lug strap allowed toseason and while still .green 'orfresh, is folded into the form shown in Fig; 5, after which, or just prior to, the bolt slots'21 are-for1nedin the ends 18. Referring to'Fig. 8,it will be-nofed that the .crowned portion ofthe .bow has the coveringleather 17 therefor following the contour 5 thereof to. the .outer edges of the structure,

so that a picker stick. 22, as indicated by the.

"dotted line's in Fig, 8, will be seento strike the crown surface practically only at a sin I Referringnow to'Fig. 4,-there is shown the I s ape. A lug strapformed of the material just described with respect to Fig. 4, therefore, while resulting in a lug strap similar to that manufactured according. to the description of Figs: 1, 2, and 3, will be slightly neater 1n -appearance because of the absence of the sharp line of division between the centrally crowned portion and the reduced portions 19. In case it is desired to make an extremely-strong lug strap and in which the question of weight is not controlling, Ifind it advantageous to roll up in the structure shown in Fig. 4, for example, rods 23 of a resilient or elastic material, such as steel,

bronze, or the like, or .may replace the same with cord or twine, as may be desired. The resulting structure is. exceedingly strong and practically negligible.

A lug strap manufactured according to my present invention has an increased. bearing surface as compared with existing lug straps as well as having a reinforced and exaggerated cushion at the bow for engagement with the picker stick. Further, as the main danger to the lug strap is the pulling out at the bolt sides gives additional tensile strength to this portion of the article and with reinforced bolt slots, the danger of breakage at this point is practically eliminated.

The application iof pressure, forming, molding, and consolidating the entire set of layers, as Well as the leather face 17, may he i applied in any Way desired, and may.advan-.

.tageously be so applied as to exert a. greater compression along the edge portions around,

slots, my improved construction of narrower aroundjhe edge portion thereof. While I i prefer to have the layers rolled, molded, and

through the application of pressureand the interrolling with suitable adhesive,results in an improved article of manufacture of great- 1y increased wearing capacity, and yet with an economical and practical construction.

Iclaimasnewis:

Having thus described my invention, what 1. That improvement in the art of manufacturing lug straps for looms and the like which consists in arranging a plurality of layers in superimposed relation, placing thereon and adjacent either end thereof re-' inforcing layers, placing a plurality of reinforcing layers in substantially central position with respect to the end reinforcements and forming the entire set of layers into a unitary structure.

2. That improvement in the art of manufacturing lug straps for looms and the like which consists in arranging a plurality or layers in superimposed relation, adding reinforcing layers at the points occupied by the bow and bolt slots of the lug strap, impregn'ating the structure with adhesive mathe central-reinforcement; and a reduced cross sectional area at the boltslot portions.v

5. That improvement in'the art of manu-c 'facturing lug straps for looms and the like, which consists in associatin a plurality of layers in superimposed'relation, applying reenforcements adjacent each end, interrolling the same intothe form of a lug strap, and subjecting the same to application of pressure to solidify and finish the strap.

6. That improvement in the art of manufacturing lug straps for looms and the like,

enforcing layers at the positions for the bow and bolt slots of the lug strap, impregnating the structure with adhesive material, rolling the same into an elongated roll, and thereupon subjecting said roll to an application of pres-- sure to form a crown portion at the centre of reen'forced section and a suitable contour for the bolt slot sections.

In testimony whereof. I h name to this specification.

WASHINGTON IRVING BULLARD;

ave signed my terial, rolling the superimposed layers of material into an elongated roll, placing the same in a mold and subjecting them to pressure to form a crown ortion at' the central reinforcement and a re uced cross sectional area at the 1 bolt slot portions.

3. That improvement in the art of manufacturing lug straps for looms and the like,

1 which consists in arranging a plurality of layers in superimposed relation, adding reinforcmg layers at the points occupied by the bow and bolt slots of the. lug strap, impregnating the structure with adhesive material, rolling which consists in associating a plurality of layers in superimposed relation, applying re-' the superimposed layers of material into an i elongated roll, placing the same in a-mold and subjecting them to pressure to form acrown portion at the central reinforcement and a reduced cross sectional area at the bolt slot portions, formingbolt slots at the end reinforced portions and folding thecompleted structure into a U-shaped form. V

4. That improvement in the art of manufacturing lug straps for-looms and the like, which consists in arranging a plurality of layv ers in superimposed relation, adding reinforcing layers at the points occupied by the bow and bolt slots of the'lu'g strap, impregnating: the structure with adhesive material, such as synthetic resin, rolling the superimposed layers of material into an elongated roll, lacing the same in a mold and subjecting t em. to pressure and heat to, form a crown portion at 

